A word from Florian, the 'Caged Demon' costume creator:

Hello!
The cage is entirely made out of wood, it is hold up by a backpack like belt system and is painted with black, brown and green standard NATO lacquer. The head of the guy behind me is made out of a wicker basket with a venetian blanco mask. The Arms and legs in the cage are made out of waste pipes, which I bent with a heat gun. He wears a hoody under a black martials arts Gi, which was the largest jacket I had at home, but anything long would work.

The idea came up when I was at the construction market to build a new terrarium for my corn snake. It was a pain in the a** to make, but was absolutely worth it.